I was running for a flight in Las Vegas, after attending SHOT Show, and knew I had a souvenir pen, or something, that looked very convincingly like a .30-06 round. If we were detained at all by security we'd miss the flight, so I dug out the "cartridge" and threw it in the trash. My buddy had one in his bag too, and nothing was said about it when we passed through security. I'm the "just my luck" type, so if I hadn't thrown mine away, we'd probably both still be in jail.